Pacman frog's upper lip swollen?

[HeatherK]

Hello again. I'm having an issue with Melon... So, she likes to burrow a lot, and when she finally dug herself up and soaked a bit, I got to looking at her lip. (See pictures.) Sorry if you can't see it too clearly, but that was the closest I could get... There's a transparent looking bump on her lip, and I don't know if I'm just being paranoid, but doesn't the part under her nose look swollen, as well? Like a little more round than usual?

She last ate Friday night, which is a little long for her, but she has been slowing down for the past 2 weeks or so before the swelling.... Does this look like something I should take to the veterinarian? Does anyone have experience with this sort of thing? I'm possibly overreacting, but I'd rather do that than lose my frog.

Thanks for any advice. I truly appreciate it!